Abstract
The stability and atomization characteristics of electrohydrodynamic (EHD) jets have been investigated experimentally. EHD jets were formed by forcing propylene glycol at a steady flow rate through a charged capillary tube. The capillary tube had an outer diameter of 890 μ m , the electric potential applied to the tube ranged from 0 to 20 kV, the liquid flow rate ranged from 100 to 500 μ l min −1 , and the gap between the tube and ground ranged from 2.5 to 5.0 cm. Observations of the fluid discharge from the capillary were made with a CCD system with a microscopic lens attachment and a synchronized strobe lamp. In general, a single jet emanating from a conical meniscus (cone-jet) was observed to be stable at applied voltages on the order of 5–10 kV. The stable configuration at higher applied voltages was a ring of smaller jets emanating from the periphery of the capillary (multi-jet). Some hysteresis was observed in the stability of each configuration. The resulting droplets in the cone-jet configuration tend to be roughly 10 times smaller than the capillary, while the droplets that break off in the multi-jet mode are roughly 30 times smaller than the capillary. The implications of the stable multi-jet mode are that for a given flow rate, smaller droplets can be produced in the multi-jet mode than in the cone-jet mode.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
